1 | /* |
2 | * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved. |
3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 | * |
5 | * This code is free software; you can redistribute it and/or modify it |
6 | * under the terms of the GNU General Public License version 2 only, as |
7 | * published by the Free Software Foundation. |
8 | * |
9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
12 | * version 2 for more details (a copy is included in the LICENSE file that |
13 | * accompanied this code). |
14 | * |
15 | * You should have received a copy of the GNU General Public License version |
16 | * 2 along with this work; if not, write to the Free Software Foundation, |
17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
18 | * |
19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
20 | * or visit www.oracle.com if you need additional information or have any |
21 | * questions. |
22 | */ |
23 | |
24 | #include "precompiled.hpp" |
25 | #include "gc/z/zAddress.inline.hpp" |
26 | #include "gc/z/zGlobals.hpp" |
27 | #include "unittest.hpp" |
28 | |
29 | class ZAddressTest : public ::testing::Test { |
30 | protected: |
31 | static void is_good_bit(uintptr_t bit_mask) { |
32 | // Setup |
33 | ZAddress::initialize(); |
34 | ZAddress::set_good_mask(bit_mask); |
35 | |
36 | // Test that a pointer with only the given bit is considered good. |
37 | EXPECT_EQ(ZAddress::is_good(ZAddressMetadataMarked0), (bit_mask == ZAddressMetadataMarked0)); |
38 | EXPECT_EQ(ZAddress::is_good(ZAddressMetadataMarked1), (bit_mask == ZAddressMetadataMarked1)); |
39 | EXPECT_EQ(ZAddress::is_good(ZAddressMetadataRemapped), (bit_mask == ZAddressMetadataRemapped)); |
40 | |
41 | // Test that a pointer with the given bit and some extra bits is considered good. |
42 | EXPECT_EQ(ZAddress::is_good(ZAddressMetadataMarked0 | 0x8),(bit_mask == ZAddressMetadataMarked0)); |
43 | EXPECT_EQ(ZAddress::is_good(ZAddressMetadataMarked1 | 0x8), (bit_mask == ZAddressMetadataMarked1)); |
44 | EXPECT_EQ(ZAddress::is_good(ZAddressMetadataRemapped | 0x8), (bit_mask == ZAddressMetadataRemapped)); |
45 | |
46 | // Test that null is not considered good. |
47 | EXPECT_FALSE(ZAddress::is_good(0)); |
48 | } |
49 | |
50 | static void is_good_or_null_bit(uintptr_t bit_mask) { |
51 | // Setup |
52 | ZAddress::initialize(); |
53 | ZAddress::set_good_mask(bit_mask); |
54 | |
55 | // Test that a pointer with only the given bit is considered good. |
56 | EXPECT_EQ(ZAddress::is_good_or_null(ZAddressMetadataMarked0), (bit_mask == ZAddressMetadataMarked0)); |
57 | EXPECT_EQ(ZAddress::is_good_or_null(ZAddressMetadataMarked1), (bit_mask == ZAddressMetadataMarked1)); |
58 | EXPECT_EQ(ZAddress::is_good_or_null(ZAddressMetadataRemapped), (bit_mask == ZAddressMetadataRemapped)); |
59 | |
60 | // Test that a pointer with the given bit and some extra bits is considered good. |
61 | EXPECT_EQ(ZAddress::is_good_or_null(ZAddressMetadataMarked0 | 0x8), (bit_mask == ZAddressMetadataMarked0)); |
62 | EXPECT_EQ(ZAddress::is_good_or_null(ZAddressMetadataMarked1 | 0x8), (bit_mask == ZAddressMetadataMarked1)); |
63 | EXPECT_EQ(ZAddress::is_good_or_null(ZAddressMetadataRemapped | 0x8), (bit_mask == ZAddressMetadataRemapped)); |
64 | |
65 | // Test that null is considered good_or_null. |
66 | EXPECT_TRUE(ZAddress::is_good_or_null(0)); |
67 | } |
68 | |
69 | static void finalizable() { |
70 | // Setup |
71 | ZAddress::initialize(); |
72 | ZAddress::flip_to_marked(); |
73 | |
74 | // Test that a normal good pointer is good and weak good, but not finalizable |
75 | const uintptr_t addr1 = ZAddress::good(1); |
76 | EXPECT_FALSE(ZAddress::is_finalizable(addr1)); |
77 | EXPECT_TRUE(ZAddress::is_marked(addr1)); |
78 | EXPECT_FALSE(ZAddress::is_remapped(addr1)); |
79 | EXPECT_TRUE(ZAddress::is_weak_good(addr1)); |
80 | EXPECT_TRUE(ZAddress::is_weak_good_or_null(addr1)); |
81 | EXPECT_TRUE(ZAddress::is_good(addr1)); |
82 | EXPECT_TRUE(ZAddress::is_good_or_null(addr1)); |
83 | |
84 | // Test that a finalizable good pointer is finalizable and weak good, but not good |
85 | const uintptr_t addr2 = ZAddress::finalizable_good(1); |
86 | EXPECT_TRUE(ZAddress::is_finalizable(addr2)); |
87 | EXPECT_TRUE(ZAddress::is_marked(addr2)); |
88 | EXPECT_FALSE(ZAddress::is_remapped(addr2)); |
89 | EXPECT_TRUE(ZAddress::is_weak_good(addr2)); |
90 | EXPECT_TRUE(ZAddress::is_weak_good_or_null(addr2)); |
91 | EXPECT_FALSE(ZAddress::is_good(addr2)); |
92 | EXPECT_FALSE(ZAddress::is_good_or_null(addr2)); |
93 | |
94 | // Flip to remapped and test that it's no longer weak good |
95 | ZAddress::flip_to_remapped(); |
96 | EXPECT_TRUE(ZAddress::is_finalizable(addr2)); |
97 | EXPECT_TRUE(ZAddress::is_marked(addr2)); |
98 | EXPECT_FALSE(ZAddress::is_remapped(addr2)); |
99 | EXPECT_FALSE(ZAddress::is_weak_good(addr2)); |
100 | EXPECT_FALSE(ZAddress::is_weak_good_or_null(addr2)); |
101 | EXPECT_FALSE(ZAddress::is_good(addr2)); |
102 | EXPECT_FALSE(ZAddress::is_good_or_null(addr2)); |
103 | } |
104 | }; |
105 | |
106 | TEST_F(ZAddressTest, is_good) { |
107 | is_good_bit(ZAddressMetadataMarked0); |
108 | is_good_bit(ZAddressMetadataMarked1); |
109 | is_good_bit(ZAddressMetadataRemapped); |
110 | } |
111 | |
112 | TEST_F(ZAddressTest, is_good_or_null) { |
113 | is_good_or_null_bit(ZAddressMetadataMarked0); |
114 | is_good_or_null_bit(ZAddressMetadataMarked1); |
115 | is_good_or_null_bit(ZAddressMetadataRemapped); |
116 | } |
117 | |
118 | TEST_F(ZAddressTest, is_weak_good_or_null) { |
119 | #define check_is_weak_good_or_null(value) \ |
120 | EXPECT_EQ(ZAddress::is_weak_good_or_null(value), \ |
121 | (ZAddress::is_good_or_null(value) || ZAddress::is_remapped(value))) \ |
122 | << "is_good_or_null: " << ZAddress::is_good_or_null(value) \ |
123 | << " is_remaped: " << ZAddress::is_remapped(value) \ |
124 | << " is_good_or_null_or_remapped: " << ZAddress::is_weak_good_or_null(value) |
125 | |
126 | check_is_weak_good_or_null((uintptr_t)NULL); |
127 | check_is_weak_good_or_null(ZAddressMetadataMarked0); |
128 | check_is_weak_good_or_null(ZAddressMetadataMarked1); |
129 | check_is_weak_good_or_null(ZAddressMetadataRemapped); |
130 | check_is_weak_good_or_null((uintptr_t)0x123); |
131 | } |
132 | |
133 | TEST_F(ZAddressTest, finalizable) { |
134 | finalizable(); |
135 | } |
136 | |